# -*- coding: utf-8 -*-            
# @Time : 2023/7/6 23:03
# @Author  : lining
# @FileName: test1.py
# class TreeNode():
#     def __init__(self, value, left=None, right=None):
#         self.value = value
#         self.left = left
#         self.right = right
#
#
# node1 = TreeNode(1)
# node2 = TreeNode(2)
# node3 = TreeNode(3, node1, node2)
# print(node3)
# eval(f'{node3}.left=none')
print(int(0.5))
